Whether it's as big as a baby or as tiny as a pebble, fossilized feces is a precious treasure. Petrified poop, also known as coprolite, is prized by scientists. When it's discovered, it opens a world into the past. Coprolites are trace fossils, which tell stories about how ancient animals and humans lived, how they behaved, and even how they died. Through accessible language and engrossing photographs, readers learn how dung detectives identify and study coprolites. Readers also explore how feces becomes fossilized. In addition, fact boxes highlight the wealth of information pulled from past poop.